CN102148634A - Antenna transmit diversity method and system - Google Patents
Antenna transmit diversity method and system Download PDFInfo
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- CN102148634A CN102148634A CN2010101099317A CN201010109931A CN102148634A CN 102148634 A CN102148634 A CN 102148634A CN 2010101099317 A CN2010101099317 A CN 2010101099317A CN 201010109931 A CN201010109931 A CN 201010109931A CN 102148634 A CN102148634 A CN 102148634A
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Abstract
The invention provides an antenna transmit diversity method and system. The method comprises the following steps of: encoding a modulation symbol to form a symbol of a visual port, wherein the visual port comprises physical antenna ports at +/-45 degrees in the same column; and polarizing, synthesizing and shaping the physical antenna ports at +/-45 degrees in the same column, mapping the symbol of the visual port into the symbol of physical antenna ports and transmitting the symbol through the physical antenna ports, wherein a polar port at +45 degrees and a polar port at -45 degrees in the same column transmit the same data. By means of the antenna transmit diversity method and system, the polar ports at +/-45 degrees in the same column are polarized, synthesized and shaped, and then data are transmitted by adopting the antenna transmit diversity method, thus not only are the performance requirements of a control channel and a broadcasting channel ensured, but also the coverage requirements of the control channel and the broadcasting channel are also ensured.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of method and system of antenna transmit diversity.
Background technology
At TD-LTE (Transmit Divison-Long Term Evolution, transmit diversity-Long Term Evolution) in the network, support 4 row dual-polarization intelligent antennas of 65 degree unit of 2300-2400MHz frequency range to have 8 physical ports (radio-frequency channel), the beam of unit of each passage in the 2300-2400MHz frequency range is designed to 65 ± 6 degree.Wherein, the physical port of+45 degree polarization is 1,2,3,4; The physical port of-45 degree polarization is 5,6,7,8; 1 and 5 is same row ± 45 degree dual polarization ports, and 2 and 6 is same row ± 45 degree dual polarization ports, and 3 and 7 is same row ± 45 degree dual polarization ports, and 4 and 8 is same row ± 45 degree dual polarization ports.
In the TD-LTE network, the control channel of LTE and broadcast channel need realize that sector signals covers.Existing method is to the method realization sector 65 degree wave beam formings of the traditional broadcast wave bean shaping of the port employing of equipolarization, to realize SFBC (Space Frequencyblock coder, space frequency block coding) between the port of difference polarization.
Be illustrated in figure 1 as the directional diagram of 65 degree beam of unit.In the drawings, the beam of unit width is 64.99 degree, drops to-10.22dB at+/-60 degree place level, and front and back are than being 28dB, and as seen this is 65 desirable degree directional diagrams.The weights that can get 65 degree broadcast beams by optimized Algorithm such as genetic algorithms are:
w＝[-0.2135+0.1616i
1.0000
0.1880+0.1324i
0.0262+0.1021i]；
Because these weights are non-constant amplitudes, therefore can bring power loss, can get its power loss by calculating is 5.468dB, approaches 6dB, just is equivalent to send with one of them passage.Wherein, the broadcast beam directional diagram of 4 passages of+45 degree or-45 degree polarization, as shown in Figure 2.
The defective of existing method is that when realizing the transmission of LTE control channel and broadcast channel, power loss reaches, and can't reach the covering requirement of LTE control channel and broadcast channel.Therefore, need a kind of method to address the above problem.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, and it is big particularly to solve existing method power loss, and the sector that can't reach LTE control channel and broadcast channel covers the problem that requires.
To achieve these goals, one aspect of the present invention proposes a kind of method of antenna transmit diversity, may further comprise the steps: modulation symbol forms the symbol of virtual port through the coding back, wherein, described virtual port comprises the physical antenna port of same row+/-45 degree, if antenna comprises 8 physical antenna ports, form 4 virtual ports, then adopt SFBC+FSTD (Frequency Switching TransmitDivision, the frequency switched transmit diversity) method is to the modulation encoding symbols, if antenna comprises 4 physical antenna ports, form 2 virtual ports, then only adopt the SFBC coding to the modulation encoding symbols; The synthetic figuration that polarizes the sign map of described virtual port is become the symbol of physical antenna port, and by described physical antenna port emission, wherein, the polarization port of same row+45 degree and the polarization ports of-45 degree is launched identical data.
The present invention also proposes a kind of system of antenna transmit diversity on the other hand, comprises coding module and mapping block.Described coding module is used for the modulation encoding symbols, and to form the symbol of virtual port, wherein, described virtual port comprises the physical antenna port of same row+/-45 degree; The described mapping block synthetic figuration that is used to polarize becomes the symbol of physical antenna port with the sign map of described virtual port, and wherein, the polarization port of same row+45 degree and the polarization ports of-45 degree are launched identical data.The present invention by to same row+/-45 degree polarization ports synthetic figuration that polarizes, adopt the method emission data of antenna transmit diversity then, not only guarantee the performance requirement of control channel and broadcast channel, also guaranteed the covering requirement of control channel and broadcast channel simultaneously.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the directional diagram of 65 degree beam of unit of prior art;
Fig. 2 is the directional diagram of section broadcast bundle of 4 passages of the same polarization of prior art;
Fig. 3 is the structure chart of 65 degree antenna elements, the 4 row dual-polarization intelligent antennas of the embodiment of the invention;
Fig. 4 is the flow chart of the antenna transmit diversity method of the embodiment of the invention;
Fig. 5 is the schematic diagram of the synthetic figuration of 8 antenna ports polarization of one embodiment of the invention;
Fig. 6 is the flow chart of 4 antenna transmit diversity methods of one embodiment of the invention;
Fig. 7 is the schematic diagram of the synthetic figuration of 4 antenna ports polarization of another embodiment of the present invention;
Fig. 8 is the flow chart of 2 antenna transmit diversity methods of another embodiment of the present invention; And
Fig. 9 is the structure chart of the antenna transmit diversity system of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
As shown in Figure 3, be the structure chart of the 65 degree antenna elements 4 row dual-polarization intelligent antennas mentioned among the present invention.This antenna comprises 8 prevention at radio-frequency port at most, wherein, 1,2,3,4 is+45 degree polarization ports, 5,6,7,8 is-45 degree polarization ports, simultaneously, 1 and 5 is same row ± 45 degree dual polarization ports, and 2 and 6 is same row ± 45 degree dual polarization ports, 3 and 7 is same row ± 45 degree dual polarization ports, and 4 and 8 is same row ± 45 degree dual polarization ports.
The present invention mainly be to same row+/-45 degree polarization ports synthetic figuration that polarizes, adopt the method for antenna transmit diversity to carry out data transmission then, not only guarantee the performance requirement of control channel and broadcast channel, also guaranteed the covering requirement of control channel and broadcast channel simultaneously.
As shown in Figure 4, the flow chart for the antenna transmit diversity method of the embodiment of the invention may further comprise the steps:
Step S401, modulation symbol form the symbol of virtual port through the coding back.
In step S401, virtual port comprises the physical antenna port of same row+/-45 degree.
Step S402, the synthetic figuration that polarizes becomes the symbol of physical antenna port with the sign map of virtual port, and passes through the emission of physical antenna port.
In step S402, the identical data of polarization port emission of the polarization port of same row+45 degree and-45 degree.
Be that example is specifically described with two embodiment below, by the description of specific embodiment, the present invention is above-mentioned and/or that add, and aspect and advantage will become more obvious.
As shown in Figure 5, synthesize the figuration schematic diagram for the 8 antenna ports polarization of one embodiment of the invention.The weights of the synthetic figuration of polarization are [1,1], and like this, 8 physical antenna ports are virtual to be 4 virtual ports, promptly 1 and 5 virtual be 1 port one ', 2 and 6 virtual be 1 port 2 ', 3 and 7 virtual be 1 port 3 ', 4 and 8 virtual be 1 port 4 '.
Then, again in conjunction with the SFBC+FSTD transmit diversity techniques of 4 antenna ports, realize the transmit diversity of 4 row dual-polarization intelligent antennas of 65 degree antenna elements jointly.
As shown in Figure 6, the flow chart for 4 antenna transmit diversity methods of one embodiment of the invention may further comprise the steps:
Step S601 to the modulation encoding symbols, obtains the symbol of 4 virtual ports.
In Fig. 6, modulation symbol s
3s
2s
1s
0Through the symbol of 4 virtual ports of SFBC+FSTD coding back formation, its sign form on each virtual port is as follows:
1) virtual port 1 ' symbol be s
0-s
1 *00, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
2) virtual port 2 ' symbol be 00 s
2-s
3 *, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
3) virtual port 3 ' symbol be s
1s
0 *00, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
4) virtual port 4 ' symbol be 00 s
3s
2 *, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
Step S602, the synthetic figuration that polarizes becomes the symbol of 8 physical antenna ports with the sign map of 4 virtual ports, and passes through the emission of physical antenna port.
As shown in Figure 6, through after the antenna terminal mapping, same row+the identical data of/-45 degree polarization port emissions.Particularly, the data of emission are as follows on the physical antenna port one-8:
Antenna 1:s
0-s
1 *00;
Antenna 5:s
0-s
1 *00;
Antenna 2:0 0 s
2-s
3 *
Antenna 6:0 0 s
2-s
3 *
Antenna 3:s
1s
0 *00;
Antenna 7:s
1s
0 *00;
Antenna 4:0 0 s
3s
2 *
Antenna 8:0 0 s
3s
2 *
Antenna transmit diversity method of the present invention is not only applicable to 4 port transmit diversities, is applicable to 2 port transmit diversities yet, that is, 4 physical ports can getting in 8 antenna ports carry out 2 port transmit diversities.
As shown in Figure 7, synthesize the figuration schematic diagram for the 4 antenna ports polarization of another embodiment of the present invention.In the drawings, choose 1,2,5,6 array antennas, can certainly choose other array antennas.The weights of the synthetic figuration of polarization are [1,1], and like this, 4 physical antenna ports are virtual to be 2 virtual ports, promptly 1 and 5 virtual be 1 port one ', 2 and 6 virtual be 1 port 2 '.
Then, again in conjunction with the transmit diversity techniques of 2 antenna ports, realize the transmit diversity of 4 row dual-polarization intelligent antennas of 65 degree antenna elements jointly.
As shown in Figure 8, the flow chart for 2 antenna transmit diversity methods of another embodiment of the present invention may further comprise the steps:
Step S801 to the modulation encoding symbols, obtains the symbol of 2 virtual ports.
In Fig. 8, modulation symbol s
1s
0Through the symbol of 2 virtual ports of SFBC coding back formation, its sign form on each virtual port is as follows:
1) virtual port 1 ' symbol be s
0-s
1 *, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
2) virtual port 2 ' symbol be s
1s
0 *, the corresponding different subcarrier of each symbol wherein, the mapping format of RE is as follows:
Step S802, the synthetic figuration that polarizes becomes the symbol of 4 physical antenna ports with the sign map of 2 virtual ports, and passes through the emission of physical antenna port.
As shown in Figure 8, through after the antenna terminal mapping, same row+the identical data of/-45 degree polarization port emissions.Particularly, the data of emission are as follows on the physical antenna port one-8:
Antenna 1:s
0-s
1 *
Antenna 5:s
0-s
1 *
Antenna 2:s
1s
0 *
Antenna 6:s
1s
0 *
Antenna 3: do not launch;
Antenna 7: do not launch;
Antenna 4: do not launch;
Antenna 8: do not launch.
Should be understood that the foregoing description only is schematic embodiment, those of ordinary skill in the art also can carry out other modifications or variation according to such scheme, for example, chooses the antenna of other row, and these modifications or variation all should be included in of the present invention comprising within the scope.
The method that should also be understood that above-mentioned antenna transmit diversity is not only applicable to 65 degree antenna elements, 4 row dual-polarization intelligent antennas mentioned among the present invention, also is applicable to the many antennas of 4 row dual polarizations of other big spacing 65 degree antenna elements.
For implementing aforesaid method, the invention provides a kind of system of antenna transmit diversity, as shown in Figure 7.Fig. 7 has shown the structural representation of the antenna transmit diversity system of the embodiment of the invention, and this system comprises coding module 100 and mapping block 200.Coding module 100 is used for the modulation encoding symbols, to form the symbol of virtual port, wherein, virtual port comprises the physical antenna port of same row+/-45 degree, if antenna comprises 8 physical antenna ports, forms 4 virtual ports, the method that then adopts SFBC+FSTD is to the modulation encoding symbols, if antenna comprises 4 physical antenna ports, form 2 virtual ports, then only adopt the SFBC coding to the modulation encoding symbols; The mapping block 200 synthetic figuration that is used to polarize becomes the symbol of physical antenna port with the sign map of virtual port, and wherein, the polarization port of same row+45 degree and the polarization ports of-45 degree are launched identical data.
The present invention by to same row+/-45 degree polarization ports synthetic figuration that polarizes, adopt the method emission data of antenna transmit diversity then, not only guarantee the performance requirement of control channel and broadcast channel, also guaranteed the covering requirement of control channel and broadcast channel simultaneously.
Those skilled in the art are appreciated that and realize that all or part of step that the foregoing description method is carried is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (14)
1. the method for an antenna transmit diversity may further comprise the steps:
Modulation symbol is through the symbol of coding back formation virtual port, and wherein, described virtual port comprises the physical antenna port of same row+/-45 degree; With
The synthetic figuration that polarizes the sign map of described virtual port is become the symbol of physical antenna port, and by described physical antenna port emission, wherein, the polarization port of same row+45 degree and the polarization ports of-45 degree is launched identical data.
2. the method for antenna transmit diversity according to claim 1 is characterized in that, to the modulation encoding symbols, comprising:
If described antenna comprises 8 physical antenna ports, and form 4 virtual ports, the method that then adopts space frequency block coding SFBC+ frequency switched transmit diversity FSTD is to the modulation encoding symbols;
If described antenna comprises 4 physical antenna ports, and form 2 virtual ports, then only adopt the SFBC coding the modulation encoding symbols.
3. the method for antenna transmit diversity according to claim 1 is characterized in that, the weights of the synthetic figuration of described polarization are [1,1].
4. the method for antenna transmit diversity according to claim 2 is characterized in that, modulation symbol s
3s
2s
1s
0The symbol that forms described 4 virtual ports through the coding back is respectively:
s
0?-s
1 *?0?0；
0?0?s
2?-s
3 *；
s
1s
0 *00; With
0?0?s
3?s
2 *。
5. the method for antenna transmit diversity according to claim 4 is characterized in that, the symbol of described 8 physical antenna ports is respectively:
s
0?-s
1 *?0?0；
0?0?s
2?-s
3 *；
s
1?s
0 *?0?0；
0?0?s
3?s
2 *；
s
0?-s
1 *?0?0；
0?0?s
2?-s
3 *；
s
1s
0 *00; With
0?0?s
3?s
2 *。
6. the method for antenna transmit diversity according to claim 2 is characterized in that, modulation symbol s
1s
0The symbol that forms described 2 virtual ports through the coding back is respectively:
s
0-s
1 *With
s
1?s
0 *。
7. the method for antenna transmit diversity according to claim 6 is characterized in that, the symbol of described 4 physical antenna ports is respectively:
s
0?-s
1 *；
s
1?s
0 *；
s
0-s
1 *With
s
1?s
0 *。
8. the system of an antenna transmit diversity comprises:
Coding module is used for the modulation encoding symbols is formed the symbol of virtual port, and wherein, described virtual port comprises the physical antenna port of same row+/-45 degree; And
Mapping block, the synthetic figuration that is used to polarize becomes the symbol of physical antenna port with the sign map of described virtual port, and wherein, the polarization port of same row+45 degree and the polarization ports of-45 degree are launched identical data.
9. the system of antenna transmit diversity according to claim 8 is characterized in that, described coding module comprises the modulation encoding symbols:
If described antenna comprises 8 physical antenna ports, and form 4 virtual ports, then described coding module adopts the method for space frequency block coding SFBC+ frequency switched transmit diversity FSTD to the modulation encoding symbols;
If described antenna comprises 4 physical antenna ports, and form 2 virtual ports, then described coding module only adopts the SFBC coding to the modulation encoding symbols.
10. the system of antenna transmit diversity according to claim 8 is characterized in that, the weights of the synthetic figuration of described polarization are [1,1].
11. the system of antenna transmit diversity according to claim 9 is characterized in that, to modulation symbol s
3s
2s
1s
0The symbol of described 4 virtual ports that form after encoding is respectively:
s
0?-s
1 *?0?0；
0?0?s
2?-s
3 *；
s
1s
0 *00; With
0?0?s
3?s
2 *。
12. the system of antenna transmit diversity according to claim 11 is characterized in that, the symbol of described 8 physical antenna ports is respectively:
s
0?-s
1 *?0?0；
0?0?s
2?-s
3 *；
s
1?s
0 *?0?0；
0?0?s
3?s
2 *；
s
0?-s
1 *?0?0；
0?0?s
2?-s
3 *；
s
1s
0 *00; With
0?0?s
3?s
2 *。
13. the system of antenna transmit diversity according to claim 9 is characterized in that, modulation symbol s
1s
0The symbol that forms described 2 virtual ports through the coding back is respectively:
s
0-s
1 *With
s
1?s
0 *。
14. the system of antenna transmit diversity according to claim 13 is characterized in that, the symbol of described 4 physical antenna ports is respectively:
s
0?-s
1 *；
s
1?s
0 *；
s
0-s
1 *With
s
1?s
0 *。
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| CN 201010109931 CN102148634B (en) | 2010-02-08 | 2010-02-08 | Antenna transmit diversity method and system |
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| CN103051366A (en) * | 2012-12-31 | 2013-04-17 | 华为技术有限公司 | Signal emission method and device |
| CN103391128A (en) * | 2012-05-07 | 2013-11-13 | 华为技术有限公司 | Virtual antenna mapping method and device |
| WO2018112920A1 (en) * | 2016-12-23 | 2018-06-28 | 华为技术有限公司 | Signal transmission method and base station |
| CN107667480B (en) * | 2015-05-29 | 2020-10-16 | 华为技术有限公司 | Transmission apparatus, method thereof, and computer-readable medium |
| CN111869126A (en) * | 2018-03-22 | 2020-10-30 | 瑞典爱立信有限公司 | Signal transmission diversity |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103391128A (en) * | 2012-05-07 | 2013-11-13 | 华为技术有限公司 | Virtual antenna mapping method and device |
| WO2013166819A1 (en) * | 2012-05-07 | 2013-11-14 | 华为技术有限公司 | Method and device for virtual antenna mapping |
| CN103391128B (en) * | 2012-05-07 | 2017-08-18 | 华为技术有限公司 | A kind of virtual-antenna mapping method and device |
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| CN107667480B (en) * | 2015-05-29 | 2020-10-16 | 华为技术有限公司 | Transmission apparatus, method thereof, and computer-readable medium |
| WO2018112920A1 (en) * | 2016-12-23 | 2018-06-28 | 华为技术有限公司 | Signal transmission method and base station |
| US10944507B2 (en) | 2016-12-23 | 2021-03-09 | Huawei Technologies Co., Ltd. | Signal transmission method and base station |
| CN111869126A (en) * | 2018-03-22 | 2020-10-30 | 瑞典爱立信有限公司 | Signal transmission diversity |
| CN111869126B (en) * | 2018-03-22 | 2024-03-08 | 瑞典爱立信有限公司 | Signal transmission diversity |
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| CN102148634B (en) | 2013-12-25 |
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